"TYPE=PLMN" next to contact number

Out of nowhere I was texting one of the contacts in my phone and the characters TYPE=PLMN appeared next to their number which replaces the original chat conversation, and the contact picture is gone and when I try to send a text it won't let me because it says invalid recipients entered. So now I have to add recipient and search the contact on my phone

Please if anyone can help it is much appreciated!! My galaxy s4 has been giving me so many problems lately and I'm really fed up